arm_compute v17.09
Change-Id: I4bf8f4e6e5f84ce0d5b6f5ba570d276879f42a81
diff --git a/tests/validation/CPP/IntegralImage.cpp b/tests/validation/CPP/IntegralImage.cpp
new file mode 100644
index 0000000..8d07e99
--- /dev/null
+++ b/tests/validation/CPP/IntegralImage.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "IntegralImage.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<uint32_t> integral_image(const SimpleTensor<T> &src)
+{
+ SimpleTensor<uint32_t> dst(src.shape(), DataType::U32);
+
+ // Length of dimensions
+ const size_t width = src.shape().x();
+ const size_t height = src.shape().y();
+ const size_t depth = src.shape().total_size_upper(2);
+
+ const size_t image_size = width * height;
+
+ for(size_t z = 0; z < depth; ++z)
+ {
+ size_t current_image = z * image_size;
+
+ //First element of each image
+ dst[current_image] = src[current_image];
+
+ // First row of each image (add only pixel on the left)
+ for(size_t x = 1; x < width; ++x)
+ {
+ dst[current_image + x] = static_cast<uint32_t>(src[current_image + x]) + dst[current_image + x - 1];
+ }
+
+ // Subsequent rows
+ for(size_t y = 1; y < height; ++y)
+ {
+ size_t current_row = current_image + (width * y);
+
+ // First element of each row (add only pixel up)
+ dst[current_row] = static_cast<uint32_t>(src[current_row]) + dst[current_row - width];
+
+ // Following row elements
+ for(size_t x = 1; x < width; ++x)
+ {
+ size_t current_pixel = current_row + x;
+
+ // out = in + up(out) + left(out) - up_left(out)
+ dst[current_pixel] = static_cast<uint32_t>(src[current_pixel]) + dst[current_pixel - 1]
+ + dst[current_pixel - width] - dst[current_pixel - width - 1];
+ }
+ }
+ }
+
+ return dst;
+}
+
+template SimpleTensor<uint32_t> integral_image(const SimpleTensor<uint8_t> &src);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute